plot_colors = [ 
    0, 0, 0; 0, 0.4470, 0.7410; 0.8500, 0.3250, 0.0980; 
    0.9290, 0.6940, 0.1250; 0.4940, 0.1840, 0.5560; 0.4660, 0.6740, 0.1880; 
     0.3010, 0.7450, 0.9330; 0.6350, 0.0780, 0.1840 ];